96 
HISTORY OF BRITISH CRUSTACEA. 
stout, elongate-triangular, with a raised granular margin 
and a raised central longitudinal line ; first ring of abdomen 
short; central caudal plate elongate-triangular; a row of 
spines on outer surface of hand. 
Sidmouth, Plymouth, and Cornwall. Mr. Couch, in his 
€ Cornish Fauna' (p. 77), says that, “this species, like those 
of the genus Callianassa , has the habit of burrowing in the 
sand, from which it rarely emerges, and then it seeks shelter 
in a crevice covered with weeds, for it is sluggish in its 
motions, and if distant from a soft bottom in which to sink, 
incapable of escaping an enemy. A female that I obtained 
loaded with spawn, was dug out of the sand in the middle 
of summer." 
Mr. Couch describes^ what he regards as a species dis- 
tinct from A . stirhynclius , but without assigning it a name ; 
he thus distinguishes it “ Beak stout, short, elongate-tri- 
angular with a raised, festooned margin, and a raised, cen- 
tral longitudinal line ; first ring of abdomen small, and on 
its fore margin are two projections which pass forward and 
join the hind portion of carapace; central caudal plate quad- 
rangular." 
* Zoologist, Oct. 1856, p. 5282. 
